learn the technique. heartmastery.com/l/your-fre... In addition to the video, on that page there is also a downloadable Workbook and Tool card below the video. It's really easy to learn.
When I get AF I do this meditation ( I usually listen to one of their webinars) I first get relaxed and then about 1 hour later I go back to NSR. Before I started this I had been having persistent AF. Now I get AF about every 2 weeks. ( One of my triggers is overdoing it physically, so I am learning to listen to my body more.) But resting by itself won't put me back into NSR.
I was at a weekend seminar where Heartmath was a secondary component when I first learned it. We were doing Heartmath several times a day the first time it worked. Now I will do it literally for a few minutes when I first get up and longer as soon as I can when I am in AF. Occasionally I do the longer webinar even if I'm not in AF I look forward to hearing other peoples experiences.